diff --git a/ts/editable/mathjax-element.ts b/ts/editable/mathjax-element.ts
index 00422972c..efd217cf1 100644
--- a/ts/editable/mathjax-element.ts
+++ b/ts/editable/mathjax-element.ts
@@ -5,6 +5,7 @@ import { on } from "@tslib/events";
 
 import { placeCaretAfter, placeCaretBefore } from "$lib/domlib/place-caret";
 
+import { createClassComponent } from "svelte/legacy";
 import type { DecoratedElement, DecoratedElementConstructor } from "./decorated";
 import { FrameElement, frameElement } from "./frame-element";
 import Mathjax_svelte from "./Mathjax.svelte";
@@ -113,8 +114,8 @@ export const Mathjax: DecoratedElementConstructor = class Mathjax extends HTMLEl
         this.dataset.mathjax = this.innerHTML;
         this.innerHTML = "";
         this.style.whiteSpace = "normal";
-
-        this.component = new Mathjax_svelte({
+        this.component = createClassComponent({
+            component: Mathjax_svelte,
             target: this,
             props: {
                 mathjax: this.dataset.mathjax,
diff --git a/ts/editor/mathjax-overlay/MathjaxEditor.svelte b/ts/editor/mathjax-overlay/MathjaxEditor.svelte
index 3ed0028ef..6c9d32bea 100644
--- a/ts/editor/mathjax-overlay/MathjaxEditor.svelte
+++ b/ts/editor/mathjax-overlay/MathjaxEditor.svelte
@@ -7,8 +7,8 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
     export let closeMathjaxEditor: (() => void) | null = null;
 
-    const closeSignalStore = writable<symbol>(Symbol(), (set) => {
-        closeMathjaxEditor = () => set(Symbol());
+    const closeSignalStore = writable<boolean>(false, (set) => {
+        closeMathjaxEditor = () => set(true);
         return () => (closeMathjaxEditor = null);
     });
 </script>
@@ -107,7 +107,10 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
         });
     });
 
-    $: $closeSignalStore, dispatch("close");
+    $: if ($closeSignalStore) {
+        dispatch("close");
+        $closeSignalStore = false;
+    }
 </script>
 
 <div class="mathjax-editor" class:light-theme={!$pageTheme.isDark}>